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Freezer

A refrigeration device and refrigerant technology, which is applied in the direction of refrigerants, refrigerators, refrigeration components, etc., can solve the problems of compressor discharge temperature rise, achieve the effect of suppressing useless capacity and ensuring operating efficiency

Active Publication Date: 2015-01-28
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of using R32 as the refrigerant, the discharge temperature of the compressor tends to increase compared to the case of using R410A and R22 as the refrigerant

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach ＞

[0046] (1) The overall structure of the air conditioner

[0047] figure 1 It is a diagram showing a refrigerant piping system of an air conditioner 10 which is a refrigeration device according to an embodiment of the present invention. The air conditioner 10 is a refrigerant piping system split-type air conditioner, and performs cooling and heating of each room in a building by performing a vapor compression refrigeration cycle operation. The air conditioner 10 includes: an outdoor unit 11 as a heat source unit; a plurality of indoor units 12 as utilization units; and a liquid refrigerant communication pipe 13 and a gas refrigerant communication pipe connecting the outdoor unit 11 and the indoor unit 12 as a refrigerant communication pipe. Connecting pipe 14. which is, figure 1 The refrigerant circuit of the shown air conditioner 10 is constituted by connecting an outdoor unit 11 , an indoor unit 12 , and refrigerant communication pipes 13 and 14 .

[0048] In addition, in...

no. 2 approach ＞

[0119] In the air conditioner 10 of the first embodiment described above, the refrigerant for injection is supplied to the intermediate injection flow path 65 and the suction injection flow path 67 from the branch pipe 62 branched from the main refrigerant flow path 11 a. In addition, in the air conditioner 110 according to Modification B of the first embodiment, the gas component of the refrigerant stored in the high-pressure accumulator 180 provided in the main refrigerant flow path 111 a is drawn out through the bypass flow path 182 . , and the injection refrigerant is supplied from the bypass flow path 182 to the intermediate injection flow path 65 and the suction injection flow path 67 . Instead of the above configuration, an air conditioner may be configured such that injection through the branch pipe 262 and injection through the bypass flow path 282 extending from the storage tank 280 can be selected.

[0120] (1) Structure of the air conditioner

[0121] In the air c...

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Abstract

This freezer uses R32 and, even when the operation efficiency deteriorates due to an intermediate injection, enables injections for keeping down the discharge temperature. An air conditioning device (10) using an R32 refrigerant is provided with a compressor (20), an indoor heat exchanger (50), an outdoor expansion valve (41), an outdoor heat exchanger (30), an intermediate injection flow path (65), an intake injection flow path (67) and injection opening and closing valves (66, 68). The intermediate injection flow path (65) merges a part of the refrigerant flowing through a main refrigerant flow path (11a) with the intermediate-pressure refrigerant in the compressor (20). The intake injection flow path (67) guides a part of the refrigerant in the main refrigerant flow path (11a) to an intake flow path (27).

Description

technical field [0001] The present invention relates to a refrigeration device, in particular to a refrigeration device using R32 as a refrigerant. Background technique [0002] Conventionally, a refrigeration device such as an air conditioner, that is, a device using R32 as a refrigerant has been proposed. In the case of using R32 as the refrigerant, the discharge temperature of the compressor tends to increase compared to the case of using R410A or R22 as the refrigerant. In recognition of this problem, an air conditioner that achieves a reduction in refrigerant discharge temperature while using R32 refrigerant is described in Patent Document 1 (Japanese Patent Laid-Open No. 2009-127902 ). In this air conditioner, a part of liquid refrigerant flowing out of a gas-liquid separator arranged in a high-pressure line is bypassed to a compressor, and the bypass refrigerant is changed into a flash gas state by an internal heat exchanger. In addition, by injecting the bypass ref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/10F25B1/00F25B41/42
CPCF25B13/00F25B2400/13F25B1/10F25B2313/0272F25B2313/0233F25B2313/006F25B9/002F25B2313/02741F25B1/00F25B49/02F25B49/022F25B2600/02F25B2345/003F25B2700/21152F25B41/40F25B2600/2509F25B2600/2517F25B2700/2103F25B39/00Y02B30/70F25B49/027
Inventor 河野聪松冈慎也冈昌弘
Owner DAIKIN IND LTD
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